#photosynthesis #plants #nature #solar #solarpower #sun #infrastructure #UrbanPlanning #urban #UrbanLife #CityPlanning #activism #environment #climate #ClimateChange #ClimateChangeIsReal #electricity
@stuffifound
Probably unintentionally, your message echoes the anti-climate Danish Democrat party.
Our car parks are not enough, and I don't want more. We can use some roofs, but it's way more expensive than in fields.
The best climate value in Denmark is large parks on low productivity land screened by a ring of trees. If we run low on land, we can take it from the 30'000 hectares used to grow canola for biodiesel (spectacularly inefficient compared to solar). Or breed slightly fewer pigs.
@jeppe
I meget runde tal:
Det danske strømforbrug er 5 GW (gennemsnit). Lad os se på at bygge solceller til 1 GW:
Solen giver maksimalt lidt over 1000 W/m². De kan omdanne 20+% til strøm, så 250W/m². Døgn- og vejrvariationer gør at man kun kan udnytte 10-25% af dette (kapacitetsfaktoren), i Danmark nærmere 10%, så 25W/m².
For at få 1 GW skal vi altså bruge 40.000.000 m² eller 40 km². Det bliver en cirkel ca. 7 km tværs over, hvis vi bygger dem samlet.
Edit: Vi dyrker dieselraps på 300 km²